Home / 9,388.32-12,956.40-5,139.90

Finding the Fourth Proportional to 9,388.32, 12,956.40 and 5,139.90

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Solution

The fourth proportional to 9,388.32, 12,956.40 and 5,139.90 is: 7,093.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,388.32 : 12,956.40 = 5,139.90 : x
  2. Step 2: Convert to fraction form
    9,388.32/12,956.40 = 5,139.90/x
  3. Step 3: Cross multiply
    9,388.32x = 12,956.40 × 5,139.90
  4. Step 4: Simplify right side
    9,388.32x = 66,594,600.36
  5. Step 5: Solve for x
    x = 66,594,600.36/9,388.32
  6. Step 6: Final answer
    x = 7,093.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.